From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Analysis of metal particles found in engine sludge to determine their origin and cause.
| Identifier | ExFiles\Box 25\3\ Scan067 | |
| Date | 18th March 1921 | |
| contd. -4- it would be as well if Mr. Hall had several samples from several engines to confirm his views that the metal particles found came from the walls of the cylinders or the piston rings. This would suggest that either the grinding materials were not thoroughly cleaned out, or that road grit was the cause of this cast iron deposit in the sludge. It will be remembered that Mr. Platford says that he found the crankshaft bearings badly worn, but this sludge does not support that the iron particles came off the steel crankshaft. R.{Sir Henry Royce} | ||